Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
danh dien » dinh dien, danh kien, danh lien
toc sach » hoc sach, doc sach, thuoc sach
qua cham » qua hai, qua cac, va cham
thuc day » thuc dan, thuc vat
hanh de » hanh ve, hanh kem
danh di » danh du, xanh di, danh gia
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu qua cham thuc day ((((danh di) or (danh dien))) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu qua cham thuc day ((((danh di) OR (danh dien))) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu qua cham thuc day ((((danh di) or (danh dien))) or (hanh de)) cua tre*.